p423fig12.20 The Spatial Pitch Network, or SPINET, model shows how a log polar spatial representation of the sound frequency spectrum can be derived from auditory signals occuring in time.  The spatial representation allows the ARTSTREAM model to compute spatially distinct auditory streams.<BR>||  SPINET model (Spatial Pitch Network) (Cohen, Grossberg, Wyse 1995).  1. input sound 2. Gamma-tone filter bank 3. Shaort-term average energy spectrum 4. MAP transfer function 5. On-center off-surround and rectification 6. Harmonic weighting 7. Harmonic summation and competition  -> PITCH